Hwang, Alexander Y. (24 de diciembre de 2009). «Manifold Grace in John Cassian and Prosper of Aquitaine». Scottish Journal of Theology63 (1): 93-108. doi:10.1017/S003693060999024X.
Saak, E.L. (2002). «Pelagian/anti-Pelagian Preaching: Predestination, Grace, and Good Works in the Sermons of Jordan of Quedlinburg, Oesa (D. 1380)». Augustiniana52 (2/4): 311-334. ISSN0004-8003. JSTOR44992752.
jstor.org
Saak, E.L. (2002). «Pelagian/anti-Pelagian Preaching: Predestination, Grace, and Good Works in the Sermons of Jordan of Quedlinburg, Oesa (D. 1380)». Augustiniana52 (2/4): 311-334. ISSN0004-8003. JSTOR44992752.